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The reddish-brown rust on iron roofing sheets consists of

Chemistry
JAMB 2007

The reddish-brown rust on iron roofing sheets consists of

  • A. Fe3+(H2O)6
  • B. FeO.H2O
  • C. Fe2O3.3H2O
  • D. Fe3O4.2H2O
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Correct Answer: Option C
Explanation

The chemical formula for rust is Fe\(_2\)O\(_3\).xH\(_2\)O, which represents hydrated iron(III) oxide, where "x" indicates the variable amount of water molecules associated with the iron oxide. 

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